Hi, I just change my wordpress theme and I'm seeing this error, any idea of what may be wrong? I'll also ask the theme's creator..
Uncaught TypeError: Cannot read property 'documentElement' of null
at c.show (bootstrap.js?ver=1.0:6)
at c.enter (bootstrap.js?ver=1.0:6)
at HTMLDocument.d (jquery.js?ver=1.12.4:2)
at HTMLDocument.handle (jquery.js?ver=1.12.4:3)
at HTMLDocument.dispatch (jquery.js?ver=1.12.4:3)
at HTMLDocument.r.handle (jquery.js?ver=1.12.4:3)
the wp theme uses bootstrap.js which conflicts with the wp supplied jquery ui library... unfortunate that theme authors continue to use stuff that conflict with base wp stuff... of course, if a wp theme and other plugins dont use the wp jquery ui, you wouldnt notice it...
the key is to get jquery ui to load after bootstrap (which theme authors could easily ensure)... since you are already loading both in the footer, probably going to have to modify the wp theme to control the loading order...
can you find in the wp theme where its loading bootstrap.js?
also should mention that you appear to be caching forum pages which is likely to cause other issues... see this on pages:
<!-- Performance optimized by W3 Total Cache. Learn more: https://www.w3-edge.com/products/ Page Caching using disk: enhanced (SSL caching disabled) Served from: www.subnoise.es @ 2017-04-03 00:24:38 by W3 Total Cache -->
the forum page is dynamic so wp plugins that cache it will do it wrong and potentially cause issues...